3500 kcal per day is nothing. One can have a basal resting metabolic rate of 2500 kcal, then do some sports and you get 3500 easily. And you seem to be a bit underweight, go build some more muscle. 75kg is featherweight for that height ;)
Incorrect. My BMI is 21.4, which is almost exactly in the middle of the "healthy" range for my height. (Healthy BMI range is defined 18.5 - 25)
Oh you put a smiley, that makes it alright then!