A 3.6, even a 3.79, will not be a strength in your application at either Penn or JHU. Not fatal, as noted above, but not a strength.
If you're admitted to either JHU or Penn, it will be because something other than your grades convinced them that they wanted you instead of another applicant. Do you know what that "something" might be? If you do, work hard on emphasizing it and showing it off to best advantage in your applications. If you don't know, then you might be in a bit of trouble.
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