The distance of a point from the x-axis is called that point. 

Concept Used:

For any point in the Cartesian Plane, its coordinates are (x, y) where the x-coordinate tells you the horizontal position (distance from the y-axis), and the y-coordinate tells you the vertical position (distance from the x-axis).

Explanation -

x-coordinate is called abscissa and the y-coordinate is called ordinate. 

So the distance of a point from the x-axis is called ordinate.