dead leaf tips (for me) mean that the roots have drowned because the soil has gotten old or tehre has been salt/fertilizer build-up. Can you tip it out of the pot and see what the roots are like?
They should be firm and bright white.

It needs to be transplanted into a pot a couple of inches larger than the one its in, also get rid of the moss on the top of the soil, use a good soil mix. I'm sure others will come along and give you great advice, your peace lily will be fine so dont worry. Cut away all the dead leaves and that will make it look better also.
Condolences over the loss of your Dad..

Thank you for your responses! :)

I have only had luck with these with absolutely no direct light on it.

Do you keep in out on that porch in direct sun?

No, I don't keep it outside. It is kept inside not in direct sunlight. I only put it out there to get a good picture.

Are you watering this plant before the top few inches of soil goes dry? Have you fertilized? If yes, tell us with what/how much/how often. You can't give too much information. Do you have a water softener? The pot has a drain hole?

Al

fluoride toxicity would be my guess. How long have you had the plant?