Placing dots above columns

Hello everyone!

In the company where I work, I have to monitor the time of response of several departments when they receive an inquiry. I have to do this month after month and verify if the average time of response increases or decreases. To present that, I am working on this graph:

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The light and dark blue columns represent the average time of response in November and December. The red and green markers represent the number of queries received by each department.

QUESTION: Instead of having both kinds of markers centred above both columns, how can I place each marker below the column to which is related? That means, how can I place the red markers above the light blue columns and the green markers above the dark blue columns? Is that even possible?

Thanks so much in advance!

Sure, thanks!

So, any tips on what I could do to place the points where I want?

Thanks