No, those points are what 2nd finished on in each of those years. What you have to look at is what 3rd finished on.
In 19/20, 82 would’ve been enough for 2nd (we’ll not get into goal difference)
If a team in 2nd finishes on 85 but the team in third finishes on 78 then the team in 2nd hypothetically didn’t need 85 to finish 2nd, they could have finished on 79 and still finished 2nd.
It’s all hypothetical, every season is different. It’s an indicator only of a required number of points for successful achievement of 2nd. I.e. you can’t really compare seasons with certainty you can only look at hypotheticals /trend or whatever the word is.