It is possible?
If possible how do I do it?
I wrote a function and added it to the default url_requests.js file. There are a couple things to note. S123 returns values in WGS84 Decimal Degrees. If the Image service you are identifying uses a different SR then you'll need to project those coordinates. There is a project function in the attached file as well. Edit line 81 to add your own ArcGIS server's geometry service. If you need to project then edit lines 21 and 22 to se your input and output spatial references.