Mom has dementia and cancer. I am needing help getting my mom moved out of her home. Are there agencies that assist with this?

I think you might have to hire someone to do this. It's unfortunate that you can't do it, but are there any other family members that could?

There are moving companies to deal with her stuff but they can't make decisions on what to keep and/or throw away.

Maybe have to hire a transport service of some sort for getting her to the new place.

Is mom on hospice? I would imagine, pancreatic cancer progresses very quickly, many times. Call the Area Agency on Aging for ideas.