As I said, to set the position at which the Horizontal Axis crosses the Vertical Axis, you need to access the options for the Vertical Axis and vice-versa.
In Excel 2016 with chart selected, access the Chart Area dropdown in the Current Selection section of the Chart Tools>Format tab of the ribbon.
From that dropdown, select Vertical (Value) Axis
The Vertical Axis will then be selected and then by clicking on the Format Selection item in the Current Selection section of the ribbon
you will see the task pane for formatting of the Vertical Axis, in which you can set the position at which the Horizontal Axis crosses the Vertical Axis