Chart from spread apart cells?

I am sorry to say this but your description does not explain at all what you are trying to do. First it would help to see whatever chart you're talking about.

An image attachment has very little value. Just attach the Excel file. It's easier than taking a screenshot first and then attaching that. Under the text box where you type your reply click the Go Advanced button. On the next screen scroll down and click on Manage Attachments, which will show a pop-up window to Select and Upload a file. Then close the window.