There is no planet called "Planet X". The term "Planet X" was used historically to refer to a hypothetical planet that was thought to be responsible for gravitational disturbances observed in the orbits of Uranus and Neptune. However, these disturbances were later attributed to the combined gravitational pull of known objects in the outer solar system.

Therefore, it's impossible to answer how far "Planet X" is from the Sun because it doesn't exist.

There are, however, some objects in the outer solar system that are sometimes referred to as "Planet Nine". These objects are still being studied, and their distances from the Sun are still being debated.

If you are interested in learning more about these objects, I recommend searching for "Planet Nine" or "trans-Neptunian objects" on the internet.