If you have 100 on the TOEFL no one cared if you have 101, 104, or 110. The ivy league couldn’t care less about your TOEFL score once you’ve reached 100. Of you’re good, you’re good.
(Same thing for subejct tests:750=760=780=800 for admission purpose).
Nothing, NOTHING “guarantees admission to the Ivy League”.
If someone has told you that they’ve lied to you.