"How high above sea level am I?" assumes that sea level is the only reference point for measuring elevation. However, elevation can be measured relative to any point, not just sea level. For example, you could measure your elevation relative to the top of a mountain or the bottom of a valley.

Additionally, "How high above sea level am I?" is not a specific enough question. It does not provide any information about your location, so it is impossible to give a precise answer. For example, if you are in Denver, Colorado, you are about 5,280 feet above sea level. However, if you are in Death Valley, California, you are about 282 feet below sea level.

Therefore, the best way to ask the question is: "What is my elevation?" This question will give you a more precise answer and will not assume that sea level is the only reference point for measuring elevation.