The calibration tool is useless, it doesn't work. Some areas of my surface pro 4 display suddenly stopped accepting touch input, I think that it happened probably like 7 months ago shortly after some windows update. I never dropped my device or did anything
bad to the display and it just one day randomly decided that some areas of the display won't accept touch input..
I tried everything and never managed to get it working, I even tried to reinstall the entire OS multiple times, but nothing worked.
If you have a similar issue, I don't think that there is a way to fix it. Microsoft probably somehow killed parts of the touchscreen with some software bug, and now they don't want to deal with it.