Thanks Mike.
After a second look, I see another page of our site ranking well for the keyword phrase. It's ranked 5th. That probably has something to do with why the other page is ranked so poorly.
The page ranked 5th is also getting an "A" rating from the On Page Keyword Optimization tool. It has a PA of 39, the DA is 50.
The PA of pages ranked 1 - 4 are; 33, 40, (unknown: Amazon), and 25.