I don't think the data table can overlap the plot
area...if thats what you are after.

An alternative is to use the camera tool to produce the
data table. First step is to add the camera button to a
buuton bar (if its not there already..):
1) Right-click any existing button bar and select
Customize.
2) Switch to the Commands tab
3) Select Tools from the categories list
4) Drag the camera tool onto a button bar

Now use the tool:
1) Select the data table range on the worksheet
2) Click the camera button
3) Switch to the chart sheet and draw out a box for the
table.
4) The table produced is sizeable and will update when the
source table is changed.

This method works for any worksheet content, not just
tables.

Cheers,
Dave