TransformExtentions.cs

using UnityEngine;

public static class TransformExtentions
{
    public static void SetX(this Transform transform, float x)
    {
        transform.position = new Vector3(x, transform.position.y, transform.position.z);
    }
    public static void SetY(this Transform transform, float y)
    {
        transform.position = new Vector3(transform.position.x, y, transform.position.z);
    }
    public static void SetZ(this Transform transform, float z)
    {
        transform.position = new Vector3(transform.position.x, transform.position.y, z);
    }
}