In SSH (Shell Access) if you have a VPS or dedicated, you can log into the shell and chmod -v 0755 ./incand that should work. If you are on shared, try looking for a File and Folder Manager Function in you Control Panel and you may be able to change it from there.
As far as it adversely affecting the performance, it shouldn't affect the performance, but it does potentially compromise security. 777 files have Read, Write and Executed permission for people who can access it. This may leave that particular folder vunerable for eggdrops and script injections into critical files that run your script. The most important files that run your script are located in this folder. This includes your database access information and file paths. Several months back, I had two of my 777 root folders hacked and the hacker placed eggdrops which inevitably setup phishing scripts on my server. Try your best to change your permissions as well as change your FTP access information frequently.
Ulysses Chico Chapman
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