MANCHESTER, Conn. — To Catherine Grant, there is little question that her 21-year-old granddaughter, Cathrine Mayo, has an intellectual disability. As Grant sees it, she’s exactly the type of person who state benefits for adults with intellectual disabilities are intended to help. Under current policy, applicants must show an IQ below 70, as well as “deficits in adaptive behavior” that arose before age 18. “Why does DDS tell people, ‘Don’t send me this child if they get an IQ over 70’? “People like my granddaughter, with just the intellectual disability and they’re around the cutoff, they can do very well in life if they have some support,” she said.