You would need to contact the coach at each school to see if you might be a recruited athlete. Find out if they would be interested in you as an athlete and, if so, what academic qualifications are needed.
Unless you have an offer from the coach and an assurance that your academics are fine, I certainly wouldn’t say Penn is a “safety school” for you.
If you are a recruited athlete that will help with admissions, if you are not recruited then the fencing is will be considered to be a good EC and that’s it.