Hi Gabe,
Since the calibration is done on an internal physiological 3D model of the eye, there is no way of adjusting the gaze point afterwards. You need to implement the calibration runner correctly and re-do the calibration.
If you want to know more about the Tobii Eye Trackers and calibration, you can check out the Tobii Eye Tracking White Paper. It is a bit old and based on our eye trackers for Research & Analysis, but many concepts are used across all Tobii eye trackers.