How to make an npc stay a certain amount of distance from the player

[EekPlayz09 (PVP_ImUnclePeteInBed)]

i have tried this

local PlayerToNpcDistanceX = (HRP.HumanoidRootPart.Position.X - NPCHRP.Position.X)
				local PlayerToNpcDistanceZ = (HRP.HumanoidRootPart.Position.Z - NPCHRP.Position.Z)
				local PosX
				local PosZ
				
				if PlayerToNpcDistanceX > 0 then
					PosX =  Vector3.new(HRP.HumanoidRootPart.Position.X + 5)
				end
				
				if PlayerToNpcDistanceZ > 0 then
					PosZ = Vector3.new(HRP.HumanoidRootPart.Position.Z + 5)
				end
				
				if PlayerToNpcDistanceX < 0 then
					PosX = Vector3.new(HRP.HumanoidRootPart.Position.X - 5)
				end
				
				if PlayerToNpcDistanceZ < 0 then
					PosZ = Vector3.new(HRP.HumanoidRootPart.Position.Z - 5)
				end
				
				--local PlayerToNpcDistanceZ = (HRP.HumanoidRootPart.Position.z - NPCHRP.Position.Z).Unit * 5
				print(PosX)
				print(PosZ)
				
				
				local MoveTo = Vector3.new(PosX, NPCHRP.Position.Y, PosZ)

				Humanoid:MoveTo(MoveTo)

				print("LEFT")

didnt work any ideas/help u can give

[CZXPEK (czo)]

local StudsAway = 5

local NPC = workspace.Rig
local NPCRoot = NPC.HumanoidRootPart

local GetNearestPlayer = function()
	local Nearest, NearestDist = nil, 9e9
	for i,v in pairs(game:GetService("Players"):GetPlayers()) do
		if (v.Character) and (v.Character:FindFirstChild("Humanoid")) then 
			local Mag = (v.Character.HumanoidRootPart.Position - NPCRoot.Position).Magnitude

			if (Mag < StudsAway) and (Mag < NearestDist) then
				NearestDist = Mag
				Nearest = v
			end
		end
	end
	return Nearest
end

task.spawn(function()
	while true and task.wait() do 
		local Nearest = GetNearestPlayer()
		
		if (Nearest) then 
			local ToUnit = (Nearest.Character.HumanoidRootPart.Position - NPCRoot.Position).Unit
			
			NPC.Humanoid:MoveTo(NPCRoot.Position + ToUnit * -1 * StudsAway)
		end
	end
end)