Yes. In the grader report, overridden grades are normally shaded in an orange color. Click on Edit Grade from report and uncheck overridden box, or go to Quick view and uncheck overridden there.
Hello Emma,
sorry for answering late - unticking "overridden" does not change the score of the test shown in gradebook.
Best regards
Sebastian
Did you try a regrade after clearing the overridden checkbox?
Do you have a minimum score set?