Picture block not sizing correctly.

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I am trying to change a picture in a block on my site. I have done this many times with no problem. Recently I was requested to update the version of concrete5 that I was using and now I can not get the picture to size correctly. Even if I just put back the same picture that was originally there it comes out much to large.
I do not have much experienced working on websites and am probably doing something silly but I have no idea what.
Please help.

 

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