Can Invisalign change the angle of teeth or only straighten them?

I had braces years ago and currently have a permanent retainer. My top row of teeth used to be angled inward slightly pointing to my mouth. They are now at a perfect flat 90-ish degree angle and it causes me a slight lisp and I hate it. Can invisalign go on the top row and angle them back a bit while keeping to the straightness or is changing the angle something only braces can do?