Your feet traveled the circumference of the Earth. That would be p*2*R, where R is the radius of Earth. Your head would have traveled the distance of 2*p*(R+1.7), assuming 1.7 meters is your height. The difference between the two would be 2*p*(R+1.7) -2*p*(R)=2*p*1.7 = (approximately) 10.7 meters. Notice that the radius of the planet canals out in the equation, which means your head would travel 10.7 meters farther than your feet on a planet of any size.