Why the places located to the north of tropic of cancer never see the sun overhead twice a year?

Places located north of the Tropic of Cancer never see the sun directly overhead twice a year because of the tilt of the Earth's axis, which is approximately 23.5 degrees. This axial tilt causes the sun to be positioned directly overhead at the Tropic of Cancer during the summer solstice and at the Tropic of Capricorn during the winter solstice. Areas north of the Tropic of Cancer remain outside this range and therefore experience the sun at an angle rather than directly overhead throughout the year.