I need to reset my model's x,y,z orientation. The back of it needs to be aligned with the z axis so I can use the edge-fade method described here:

How do you fade the edges of a model?

Right now the model's orientation seems to be at an odd angle. Thank you for help!

EDIT: Problem solved.

Set normal orientation of origin

This answers the question. I am leaving my question here in case anyone else does not know to look for "normal orientation"!