Hi JUSTINMERTZ, Once an assessment is published and students have taken it, you can't remove or edit questions for a score change. The are a few things you can modify in Settings, if you click the assessment then the cog wheel in the upper right corner of the screen. You can also modify mastery levels if that helps in any way.

There is a work around to fixing errors, see the information below:
In Mastery Connect, you may discover assessment items containing errors which lead to incorrect scoring. If you discover items with errors that affect the scoring and students have already taken the assessment, you can correct their scores. Additionally, you can create a correct version of the assessment by cloning it and replacing the incorrect item.
Hopefully that helps!