Changing 3D camera tracker ground plane and origin for existing objects

I think I see what you're saying. Every time I create an object (text, solid, etc.) to track to the image, it creates a dedicated 3D tracker camera for that specific object. I have some text that I've created to track to specific tracker points, but after creating it and editing it (size, font, color, position etc.), I find that it doesn't track very well to the tracker points I created it from, so now ideally I would like to just create a new 3D camera tracker layer from different points and attach the existing text to that, so that I don't have to waste time re-creating it. Does that make any sense?

Thanks for the answer. Forgive my ignorance, but maybe I'm not doing it right. When I parent the objects to the null and move the null, it just moves everything along the same ground plane. I am trying to move them to a different plane.