To determine how many feet above sea level Jill would be after climbing 100 feet more, we need to know her current elevation above sea level.
Let’s assume Jill's current elevation is \( x \) feet. After climbing an additional 100 feet, her new elevation would be:
\[ x + 100 \text{ feet} \]
To give a specific answer, please provide Jill's current elevation in feet above sea level.