Isn't that a bit too high?
Anyway, you can easily do this yourself with
Magos' War3 Model Editor. Here's a detailed explanation:
1. Open the War3 Model Editor
2. Go to Windows -> MPQ Browser
3. File -> War3x.mpq
4. Find the model (Abilities\Spells\Other\BreathOfFire\BreathOfFireMissile.mdx) and open it (double click)
5. Close the MPQ Browser
6. Go to Windows -> Model Editor
7. Selection -> Select All
8. Transformations -> Translation
9. Type X:0 Y:0 Z:500 and click OK
10. Close the Model Editor window.
11. Go to Windows -> Node Manager
12. Right click the first node (Dummy01) and select Edit Node
13. Increase the Z: value by 500. Currently it's set to 33.7758. So, 500+33.7758=533.7758
14. Click OK
15. Repeat the process (increase Z by 500) for every node on the list (the next one is Plane04)
16. When you're done close the Node Manager and save your model (File ->Save As)
17. Import the model and enjoy.