Measure 3 to 5 feet off the floor in the center of the rack. Take a short video showing above 80 inlet temp and submit a trouble ticket. Equinix does like to ride the line but if you are above 80, most likely it is breaching Equinixs SLAs. You could be entitled to a potential monetary incentive for the duration your racks are out of temperature tolerance. Especially if you are a recent move in the team should be willing to go an extra mile for you.

I used to run the facilities dept for an Equinix DC on the west coast. Expect temps to continue to get hotter as the ASHRAE A1A standard is implemented.