http://www.syndiv.com/ce/download.php
Edit: This is much easier to do in Windowed mode also forgot to add so you dont have to switch back and forth.
If you still need it.
Here's a walkthrough/guide
install cheatengine then go to settings. It's under the Cheat Engine logo up right corner. Go to the extra tab. Activate read/write
process Memory and Enable use of the Process watcher and both stealth modes.
If cheat engine ask you to type in anything just type a 0 and press enter/return
ok now you have the hack tool to do the basic hacks in WoW.
Start up cheatengine if it is not loaded yet.
Start WoW ALT-TAB and go to Cheatengine then press the little computer icon in the top left corner and choose WoW.exe in the list there.
and press OK.
now cheatengine is attached to the running process.
Now, where it say "Scan type" Select unknown initial value.
And press first scan (Might take a while) and you will see up under the icon of the computer "Found: 342792347" Or some random number, that's how many addresses there are. Next step, move north.
Change Scan type to has decreased, press "next scan".
South, increased "Next scan"
Stand still "unchanged value" Next scan.
Repeat untill you get very few "Found" and it will list in the window.
When you think you've fond it, select it and press the red arrow pointing Down-right.
Now yor selected value jumped down.
Where it say "Value" Under it it should be a number, double click it. Then change it.
Can also click on "No description" and type Y axis etc.
Repeat for X and Z.
Hope it helps you.
Note that playing with the Z axis to much can be seen. They also check long teleports. I will not take responsability for anyone that gets banned.
Going up in the air will not prevent mobs from attacking you.