I don't see how to do what you want interactively. The problem is the stacking. You want JMP to put the labels above the "fail" bars, but not the "pass" bars. That would make the label for the fails look like a label for the entire bar. Plus, the scales for pass vs. fail are very different, which is why the fails look so small and are illegible.
Why not consider separating the passes and fails? I have provided an example below. It makes it pretty clear which categories have lots of fails and passes. Plus, the fail scale is much clearer so I can more easily see which categories have no fails. Before, any category with a 1 looked like a 0. This is much clearer to me, at least.
Dan Obermiller