Controlling a point

Is there a way i can add a number slider to either the point or surface so that i can control its variables eg. move in x,y,z axis??

im trying to look at the relationship of least resistance between point and surface, hopefully somehow controlling the point rather than surface if poss..VB%20workshop%20-%20Harvard%20GSD%20-%20woojsung.com%20-%20part2%20...