Re-positioning tracking point [AE

I’m working with Optical Flares now for After Effects. I can’t trace a light, so I’m tracing a point next to it. Now I want to replace the tracking point to the light, so all X and Y position should be moved relatively. I can’t figure it out, and I don’t want to up scale my flare.

The attached image will explain it best.

Attached Images

via Video Editing Forums: Digital Director – Adobe Premiere, Premiere Elements, and After Effects