finding trigger in one channel to offset another

Hello,

I have many sets of just 2 channels (force vs Displacement)

I need to find the displacement value at 5 newton's so I can offset the displacement channel to zero. normally I would just delete what I don't need and offset it. but I will have 50 sets to do at a time. I know once I get this part figured out I can just replicate it for the rest of my channels