Yes, the survey author does have the ability to view and edit individual responses in the Analytics section. However, at the moment, it is not possible to view the original response values once they have been edited.
That said, QuestionPro does provide some level of tracking—you can identify which response was edited, for which survey, and which question was modified. However, the platform currently does not maintain a version history or log that shows the pre-edit (original) response data.