Yes, you can show the variance between two lines in a graph using Excel. Here are the steps:

1. Select the data for both the baseline and "where we are today" lines.
2. Insert a line chart by going to the "Insert" tab and selecting "Line" from the chart options.
3. Right-click on one of the lines in the chart and select "Add Data Labels".
4. Right-click on one of the data labels and select "Format Data Labels".
5. In the "Format Data Labels" pane, select "Value from Cells" under the "Label Options" section.
6. Select the range of cells that contain the difference between the two lines.
7. Click "OK" to close the "Format Data Labels" pane.

This will add data labels to the chart that show the difference between the two lines. You can also format the data labels to make them more visible, such as changing the font size or color.