If anything it'll be below 100 due to altitude. For example salt water for making pasta boils still at approx 100 deg. C. It takes quite a lot of salt (way more than you would ever want to consume) to meaningfully raise the boiling point.

if youre boiling water, it can be any arbitrary temperature above 100.

That's not how boiling works. The water heats up to its boiling point where it stops and boils. While boiling the temperature does not increase, it stays exactly at the boiling point. This is called "Latent Heat", at its boiling point water will absorb heat without increasing in temperature until it has absorbed enough for its phase to change.

There is an exception to this called superheating