First off, the chart in the summary screen shows EVs, not IVs. EVs are completely different.
To see a Pokemon's IVs, first you must beat the game AND hatch 20 eggs. Then, you go to the Battle Tree and talk to a trainer near the PC. If you've hatched 20 eggs, he'll give you access to the IV section of the PC.
From there, the PC can tell you a Pokemon's IVs if you touch the "Judge" button, which is NOT in the summary screen.