Not a Pro but came up with this query

with CTE as

(select ROW_NUMBER() over( partition by CustomerID order by invoiceid) as rn,* from #invoices)

select t1.invoiceid,t1.customerid,t1.total from CTE t1

left outer join CTE t2

on t1.CustomerID = t2.CustomerID

and t1.rn = t2.rn +1

where (t1.Total-t2.Total) > 10