Welcome to the Community.
Here is how I have been able to solve your issue.
The answer lies in being able to have a column that can be used as an overlay column, which will separate displays of the Height and Weight values. In your example, it would be separating the 12 and 13 columns. To accomplish this, I duplicated all of the rows in my data table, separating the Height and Weight values onto one copy of the rows and then added a new column called "Column" that indicated which rows had the Height values present and which had the Weight values present.
Then it just became a simple matter of dragging the Height and Weight values to the Y axis, Right clicking on the Y axis and selecting "Move Right" to move the Weight axis to the right hand side. Then dragging the X column to the X axis, and the new column called "Column" to the Overlay drop area.
Jim