I would say 'The Pacific Ocean is 11,034 meters deep at the ocean floor's lowest point.'[/COLOR]
or better 'The deepest part of the Pacific Ocean is 11,034 meters deep.'
I agree with 2006 that it is better way of expressing depth of a thing such as ocean, as because ‘deep’ in real sense means going far down from the top or surface. However, expressing deepest point of a ocean as some distance is Ok but not the highest point which is always expressed as the distance above see level and its opposite, the lowest point as distance below sea level. We say: The lowest point in Antarctica is the Bentley Sub glacial Trench which is 25.40 meters below sea level. It is covered with ice and in fact it is the lowest point of land surface on earth. If Antarctica's ice were to melt, exposing the trench, it would be covered by water from sea. Similarly, the highest point on earth is the top of Everest mountain 8,848 meters above sea level