Waterfall chart

Refer the pivot table and the waterfall chart for the pivot table.
We have a “154% total” bar on the extreme right in the chart. What does this 154% represent?
Also, I dont want the bar chart to appear in my visual, but i dont have the option to remove it.

I think it doesnt make sense to add/substract percent values. Any comments on the intuition behind the value 154%?

By design, the waterfall chart displays the cumulative sum as the Total column. At present there is no option to disable it. You can try hiding the total column by overlapping some other visual(e.g. narrative visual) in case you are using the free form layout.
This would be a new feature request which has been noted