visualise mean and standard deviation values in chart/graph

[doters]

Hello, I got help before and someone made these values that give my graphs/charts lines that are supposed to show MEAN and Standard deviation,
not sure if they actually do so I am asking again here,

In the file added I want the mean and stdav to be shown visually on the charts somehow,

The little red "EDIT" part shows the MEAN and STDAV of the data/IT group (red) and these values are the ones I would like to somehow visualise in the charts/graphs? is that possible?