Not understanding [RPC]

(Edit for bump)

Alright, so I wrote a script for playerHealth and I'm trying to update it so each player over the network will have their own health, but I'm running into the problem where on Client A, I'll have 100 health, and my enemy will have 70 health, but on Client B, we will both have 100 health.

Just not understanding the RPC I guess, I tried using (networkView.isMine) on it, but that didn't work as the networkView is owned by the server. I just don't really know what I'm doing here, how would I make it update.

Lets just say for instance this scripts name is HealthManager and the variable is myHealth, just for an example.

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I was asked for some code, so here's what I have, although, there isn't any RPCs because I'm trying to understand how to use them.

 using UnityEngine;
 using System.Collections;

 public class PlayerStatistics : MonoBehaviour {
     
     bool enabled = false;
     
     //~~Variables Start
     public int currHealth, maxHealth;
     //~~Variables End
     
     void Awake() {
         enabled = true;
     }
     
     // Use this for initialization
     void Start () {
         if(enabled) {
             maxHealth = 100;
             currHealth = maxHealth;
         }
     }
     
     // Update is called once per frame
     void Update () {
         if(enabled) {
             
         }
     }
     
     void OnGUI() {
         if(enabled) {
             GUI.Box (new Rect(20, 20, Screen.width / 3, 30), "Health: " + currHealth + "/" + maxHealth);
         }
     }
 }

here's the code I use to do combat

 using UnityEngine;
 using System.Collections;
 
 public class PlayerCombat : MonoBehaviour {
     
     bool enabled = true;
     
     //~~Variables Start
     public GameObject enemyTarget;
     PlayerStatistics enemyStats;
     //~~Variables End
     
     void Awake() {    
         enabled = true;
     }
     
     // Use this for initialization
     void Start () {
         if(enabled) {
 
         }
     }
     // Update is called once per frame
     void Update () {
         if(enabled) {
             Ray ray = Camera.main.ScreenPointToRay (Input.mousePosition);
             RaycastHit hit;
             
             if(Input.GetButton("Fire2")) {
                 if(Physics.Raycast (ray, out hit, 100)) {
                     if(hit.collider.tag == "Player") {
                         if(hit.collider.gameObject != gameObject) {
                             Debug.Log ("Clicked other player");
                             enemyTarget = hit.collider.gameObject;
                         } else {
                             Debug.Log ("Clicked self, not targetting");
                         }
                     }
                 }
             }
             if(enemyTarget != null) {
                 enemyStats = enemyTarget.GetComponent<PlayerStatistics>();    
                 if(Input.GetKey(KeyCode.F)) {
                     enemyStats.currHealth -= 10;
                 }
             }
         }
     }
     
     void OnGUI() {
         if(enabled) {
             if(enemyTarget != null) {
                 GUI.Box (new Rect((Screen.width / 3) + (Screen.width / 3), 20, Screen.width / 3, 30), "Enemy Health: " + enemyStats.currHealth + "/" + enemyStats.maxHealth);
             }
         }
     }
 }