Auto Delete in Excel

Is it possible to accomplish the following scenario?

1. G2 has an "X" in the cell
2. Once my imported data causes H2 to have a higher value than J2, I would like for the "X" in G2 to be automatically deleted. Obviously, I have 100's of rows that need to be able to do that, not just row 2.

That would enhance the conditional formatting that I have in my spreadsheet.

Thanks.