MapInfo Pro treats coordinates as specifying longitude and latitude on a sphere. In the Western hemisphere, this means that X coordinates (longitude) increase to the left, rather than to the right, as in standard non-earth coordinates. This means that a point on the left side of your map has a greater longitude than a point on the right side of your map.
In the Eastern hemisphere this is not the case. X increases to the right as you would normally expect.
Latitude (the Y coordinate) increases in a downward direction for maps of areas south of the equator. For areas north of the equator, latitude increases as you move up. This corresponds to the way it works in non-earth coordinates.