The boiling point of water decreases with increasing pressure. At high altitudes, the atmospheric pressure is lower than at sea level. Where would you expect to find the highest boiling point temperature of water?

The boiling point decreases with increasing pressure. So, the lower the pressure, the higher the boiling point. At high altitudes, the atmospheric pressure is low, so the boiling point should be higher at higher altitudes. The highest altitude listed is at the top of Mount Everest